Nurse carrying cocoa mixed for animal (7)
I believe the answer is:
raccoon
'animal' is the definition.
(I've seen this before)
'nurse carrying cocoa mixed' is the wordplay.
'nurse' becomes 'rn' (RN is an example).
'carrying' indicates putting letters inside.
'mixed' is an anagram indicator.
'cocoa' anagrammed gives 'accoo'.
'rn' enclosing 'accoo' is 'RACCOON'.
'for' acts as a link.
(Other definitions for raccoon that I've seen before include "Omnivorous nocturnal mammal native to N and C America" , "Smallish mammal" , "Smallish American animal" , "US mammal with a fox-like face" , "North American mammal with a ringed tail" .)